Re: Finding size of a raw device

Hi ,Probably I found the answer to this .On a filesystem, by doing an lseek the OS cantrack the size of the file via the inodes .Thus, an lseek with SEEK_END would give thefile size , as the inode tables provide theneeded support for the OS .But since a raw device bound to a file is adirect interface , there is no way in whichthe OS can figure out its limits , and thuslseek with SEEK_END would yield a zero .It would be nice if somebody could confirmthe above explanation .Cheers !--- Learner <ruxyz@xxxxxxxxx> wrote: > Hi ,>>   I was trying to find the size of a raw partition> using the below program , but the output is not> correct. Can anybody suggest how to rectify this> program.>>   Is it that "lseek" should be used only on regular> files and not special files ?Is there a proc entry> which reflects the currently bound raw devices ?>>    I'am aware that "raw -qa" gives the complete list> of raw devices , but I wanted to know if there is> any other method to do so .>>> PROGRAM :->> #include <sys/types.h>> #include <sys/stat.h>> #include <fcntl.h>> #include <unistd.h>>> main()> {>    int fd ;>    int start, end ;>>    fd=open( "/dev/raw/raw1", O_RDONLY );>>    start=lseek( fd, 0, SEEK_SET );>>    printf("The Start pt size is %d \n", start);>>    end=lseek( fd, 0, SEEK_END );>>    printf("The End pt size is %d \n", end);> }>> OUTPUT :->> The Start pt size is 0> The End pt size is 0>>> Cheers!>>>